Nurikabe


Translate this site.

Nurikabe is a logic puzzle with a bit complicated rules and challenging solutions.

The rules are not so simple. :)
You have a grid of squares Some cells of the grid start containing numbers. The goal is to determine whether each of the cells of the grid is "black" or "white" (Islands in the Stream calls these "water" and "land" respectively). The black cells form "the nurikabe" (Islands in the Stream calls it "the stream"): they must all be orthogonally contiguous (form a single polyomino), number-free, and contain no 2x2 or larger solid rectangles (Islands in the Stream calls such illegal blocks "pools"). The white cells form "islands" (which is where Islands in the Stream got its name): each number n must be part of an n-omino composed only of white cells. All white cells must belong to exactly one island; islands must have exactly one numbered cell. Solvers will typically shade in cells they have deduced to be black and dot (non-numbered) cells deduced to be white.
Left click on a square to make it black. Right click to mark with dot. Click and drag to mark more than one square.

Video Tutorial
Hide the rules

Share

Nurikabe


5x5 Easy Nurikabe | 5x5 Hard Nurikabe | 7x7 Easy Nurikabe | 7x7 Hard Nurikabe | 10x10 Easy Nurikabe | 10x10 Hard Nurikabe | 12x12 Easy Nurikabe | 12x12 Hard Nurikabe | 15x15 Easy Nurikabe | 15x15 Hard Nurikabe | 20x20 Easy Nurikabe

This Month
1. numbrr
218
00:21.06
2. puzzleist
61
00:29.59
3. Xarpe
21
00:47.81
4. Ramasp
210
01:00.62
5. John9439
84
01:14.42
6. banjo saint james
11
01:39.19
7. chiimo 01:50.90
8. maciao4515 02:08.60
9. matsagad
13
02:29.85
10. Jennalynn Morton
94
02:32.07
11. bearjason 02:48.63
12. emmms
25
02:56.45
13. Manuel2 03:01.67
14. herrenreee 03:09.42
15. Truth-or-Peace
83
03:14.65
16. yirenguihua 03:22.32
17. JustDave 03:25.38
18. tinkin
4
03:26.51
19. MisterBarbarian 03:54.92
20. siaalove
47
04:04.27
This Week
1. puzzleist
61
00:29.59
2. matsagad
13
02:30.35
3. Manuel2 03:01.67
4. yirenguihua 03:22.32
5. MisterBarbarian 06:11.21
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. puzzleist
61
00:36.20
2.--- empty -----:--
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. bearn
194
00:22.22
2. vowels
202
00:26.05
3. sfumato
164
00:26.65
4. numbrr
218
00:28.06
5. haramey
171
00:28.31
6. Douglas Shamlin Jr.
543
00:32.25
7. puzzleist
61
00:32.39
8. qqwref
259
00:32.64
9. miggy
86
00:34.69
10. mediteran13
54
00:35.13
AO5
1. bearn
194
00:24.08
2. vowels
202
00:27.49
3. sfumato
164
00:28.12
4. haramey
171
00:28.77
5. numbrr
218
00:31.32
6. Douglas Shamlin Jr.
543
00:31.44
7. puzzleist
61
00:34.41
8. miggy
86
00:35.71
9. qqwref
259
00:35.91
10. mediteran13
54
00:42.16
AO12
1. bearn
194
00:27.02
2. vowels
202
00:28.27
3. sfumato
164
00:33.67
4. haramey
171
00:35.19
5. numbrr
218
00:35.50
6. Douglas Shamlin Jr.
543
00:36.08
7. puzzleist
61
00:38.76
8. qqwref
259
00:43.40
9. miggy
86
00:47.30
10. schapel
38
00:52.22
Robots / programmatic solversinfo  
1.4s4f400:00.373
2.Charlie Li
61
00:00.485
3.nbjohnson00:00.735

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
You need to be logged in to track your averages


Find your position in

Enter screen name:


More Logic Puzzles:  hideshow

2024-02-21 12:33:11

www.puzzle-nurikabe.com
Remove Ads